Sealing device



April 24, 1928.

F. YPERRIN smmua nsvxca Filed May 20. 1927 2 Sheets-Sheet 1 April 24, 1928. 1,667,563

F. PERRIN SEALING DEVICE Filed May 20, 1927 2 Sheets-Sheet 2 Patented Apr. 24, 1928.

' omrsn; sirres 1,667,553 P TE -r creme. J

FRANCIS PERRIN, OF PRRIB,

SEALING nnwenl Application filed May 20, 1927, Serial No. 192,948,1114- a nelg-imla -u, 1m: I

This. invention relates to sealing devices andmore particularly to hand presses adapted to be used onlead seals and the like- Qne of the objects of theinvention is to provide a cam operated press capable of eing actuated by the movement of one han for. actuating a plurality of'pressure cams in predeterminedv order, each cam being) prevented from reversing until its pressure stroke is completed. 7

Additional objects will appear in the course of the detailed description. whiehwill now be given with reference to. the accom panying drawings in which Fig. 1: is asection passing through ,the'axis of symmetry of one form of the device;

Fig; 2 is a partial transverse section of the apparatus shown in Fig. 1;

Fig. 3 is an enlarged detail of part of the pressure member illustrated in Fig.1;

Fig. 4 is an enlarged detail of the ratchet assembly shown in Fig. 1-;

' sure operation.

Fig. 5 represents a second form of the invention in a section taken similarly to that of Fig. 1; p

Fig. 6 is a partial. horizontal section of the form of device shown in Fig. 5;

- Fig. 7 illustrates a lead seal prepared forinsertion in the press; a 7

Figs. 8, 9 and 10. show the state of the seal during successive stages of: the'pres- Referring to Figuresl to 4 of the drawings, there is shown an inactive handle a formed integral with. or connected to an aperture block comprising an anvil portion a a cylindricalguideway a and a pair of lateral ears a Slidably mounted in a is a hammer or pressure element 6 formed with a projecting oam-contacting portion and fitted with a pin 6 extending at right'angles 'theretoi. Alpin. c is-mo unted arrears-attend carries f (l) movable handle d'and an assembly compi'isin a. cam. e and a; air. of parallel ratchets ot specialformf, pre erabl all. fastened. together, and mounted. to free rotate on'pi'n 0.. Gamemay beformedwit a. plurality o tbosseaeach ofsuflicient lengthto' actuate pressureelement I) throu h any desired distance. Ratchets carry. times as many large teeth: as. camehashosses. (N

being. anyinteger such as 1, 2 3, 4;.ete.)j and each large tooth is formed so as to present a. series of smaller teeth Pairs ofdetents g. andy' are pivotally mounted on. handlesd and a respect-ive'lyhy'meansof pins handle. Detents g ane formed with arounded nose (Fig. .4) seas-to engage withonlythe large teeth. of the ratchets. Detents-yfeontrarijwise have a. spurred extremity and are mpable of; engaging with. either.v (or. both); the large and/small ratchet teeth. The apparatus is completed by a.. s'pring-actnated as.- semhly n. tending to returngelement b to.- its original or retracted position and. a. spring element m havin the same. functionv relatively to movable andle 01.

The manner in. which the device. operates is. as. follows :.-A. sealis placed. between. a}

g and. b and: handle at actuatedto exert com.-

pression.v Assuming; the device. to have started from the position shown in 1, the

pressure on handle at will be transmitted through detent g to the face of a large ratchet tooth and will rotate cam- ,e. "The latter will bear onthe top surface of pressure. element 1) and compress the seal. If the downward movement of handle (1 is'interrupted for any reason, detent 7' will engage with a small ratchet tooth and prevent the cam from reversing. If the compressing operation takes place inthe normal Way,

handle at will make N excursions to complete each downward movement of element 6 belng the ratio of large ratchet teeth to cam bosses i. e. two, in the form of device shown in Fig.1) I I The apparatus shown in Figs. 5 and 6 is designed primarily to operate on seals of the type shown in Figs. 7 to 10 i. e. those havingtwo upstanding edges of difierent diameter. The principle of operation is identical with that of the device already described except that two concentric. h mers or compression elements I; and B are provided which are actuated in timed rela- 'tion by two separate cam surfaces '0 and E arranged tobe out of step with one another. Ratchets f, as in the device shown in Fig. 1, are arranged to operate together on each side of cam e and cam surfaces E adjoin ratchets f. A power transmitting assembly consisting of a pin 0, cam actuated levers 0 and 0, links grand Q and springs n and N, permits hammers b and B to be independently actuated in any desired time relation, detents g and joperating' on ratchets 7, exactly as in the device having a single hammer. From the foregoing, it will be evident that if the seal shown in Figs. 6 to 10 be placed in the press with surface 1 resting on a and cord 4 in proper position, edges' 3 and 2 may be bent over as shown in Figs. 9 and 10 by the successive action of b and B. 7 If desired, the press may be provided with a beak or projection r adapted to engage with the loop of cord 4t so as to facilitate insertion of the seal in the press.

As will be obvious, to those skilled in the art, the invention need not take the form of the structures hereinbefore described but may vary within the broad limits of the general inventive principle. Thus, the orienratchet having a plurality of large teeth to a number equal to some whole multiple of the number of bosses on the cam, said large teeth having smaller teeth formed thereon, a detent formed to engage with the small teeth of said ratchet, a second detent formed to engage only with the large teeth of said ratchet, and means for transmitting pressure to said second detent.

2. A device of the class described comprising in combination a block formed to providea pressure supporting surface, a guideway and a pairof ears, a pin supported by said cars, a pressure element slidably mounted in said guideway, a cam,-a ratchet and a manually operable lever mounted on said pin, said cam being rigidly connected to said ratchet and arranged so asto actuate said pressure element, said ratchet having a plurality of large teeth formed thereon and a plurality of small teeth formed on said large teeth, resilient means associated with the pressure element and opposing the action of the cam, a detent pivotally mounted on said block and formed so as to engage with i the small teeth of the ratchet, resilient means for maintaining said detent in contact with the ratchet, a second detent pivot-ally mounted on the manually operable lever and tin-med to engage only with the large teeth of the ratchet, resilient means for maintaining said second detent in 'con'tact'with the ratchet, and resilient means opposing the movement of the manually operated lever toward the block.

In testimony whereof I allixed'my signature. i

FRANCIS ERRIN] 

